drm/vbl rework: rework how the drm deals with vblank.
Other Authors: Michel Dänzer <michel@tungstengraphics.com>
mga: Ian Romanick <idr@us.ibm.com>
via: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
This re-works the DRM internals to provide a better interface for drivers
to expose vblank on multiple crtcs.
It also includes work done by Michel on making i915 triple buffering and pageflipping work properly.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/char/drm/i915_drv.h b/drivers/char/drm/i915_drv.h
index 50cd68d..c614d78 100644
--- a/drivers/char/drm/i915_drv.h
+++ b/drivers/char/drm/i915_drv.h
@@ -76,8 +76,9 @@
typedef struct _drm_i915_vbl_swap {
struct list_head head;
drm_drawable_t drw_id;
- unsigned int pipe;
+ unsigned int plane;
unsigned int sequence;
+ int flip;
} drm_i915_vbl_swap_t;
typedef struct drm_i915_private {
@@ -90,7 +91,7 @@
drm_dma_handle_t *status_page_dmah;
void *hw_status_page;
dma_addr_t dma_status_page;
- unsigned long counter;
+ uint32_t counter;
unsigned int status_gfx_addr;
drm_local_map_t hws_map;
@@ -103,13 +104,18 @@
wait_queue_head_t irq_queue;
atomic_t irq_received;
- atomic_t irq_emitted;
+ atomic_t irq_emited;
int tex_lru_log_granularity;
int allow_batchbuffer;
struct mem_block *agp_heap;
unsigned int sr01, adpa, ppcr, dvob, dvoc, lvds;
int vblank_pipe;
+ spinlock_t user_irq_lock;
+ int user_irq_refcount;
+ int fence_irq_on;
+ uint32_t irq_enable_reg;
+ int irq_enabled;
spinlock_t swaps_lock;
drm_i915_vbl_swap_t vbl_swaps;
@@ -216,7 +222,7 @@
extern int i915_driver_device_is_agp(struct drm_device * dev);
extern long i915_compat_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg);
-
+extern void i915_dispatch_flip(struct drm_device * dev, int pipes, int sync);
/* i915_irq.c */
extern int i915_irq_emit(struct drm_device *dev, void *data,
struct drm_file *file_priv);
@@ -227,7 +233,7 @@
extern int i915_driver_vblank_wait2(struct drm_device *dev, unsigned int *sequence);
extern irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS);
extern void i915_driver_irq_preinstall(struct drm_device * dev);
-extern void i915_driver_irq_postinstall(struct drm_device * dev);
+extern int i915_driver_irq_postinstall(struct drm_device * dev);
extern void i915_driver_irq_uninstall(struct drm_device * dev);
extern int i915_vblank_pipe_set(struct drm_device *dev, void *data,
struct drm_file *file_priv);
@@ -235,6 +241,9 @@
struct drm_file *file_priv);
extern int i915_vblank_swap(struct drm_device *dev, void *data,
struct drm_file *file_priv);
+extern int i915_enable_vblank(struct drm_device *dev, int crtc);
+extern void i915_disable_vblank(struct drm_device *dev, int crtc);
+extern u32 i915_get_vblank_counter(struct drm_device *dev, int crtc);
/* i915_mem.c */
extern int i915_mem_alloc(struct drm_device *dev, void *data,
@@ -379,21 +388,91 @@
/* Interrupt bits:
*/
-#define USER_INT_FLAG (1<<1)
-#define VSYNC_PIPEB_FLAG (1<<5)
-#define VSYNC_PIPEA_FLAG (1<<7)
-#define HWB_OOM_FLAG (1<<13) /* binner out of memory */
+#define I915_PIPE_CONTROL_NOTIFY_INTERRUPT (1<<18)
+#define I915_DISPLAY_PORT_INTERRUPT (1<<17)
+#define I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT (1<<15)
+#define I915_GMCH_THERMAL_SENSOR_EVENT_INTERRUPT (1<<14)
+#define I915_HWB_OOM_INTERRUPT (1<<13) /* binner out of memory */
+#define I915_SYNC_STATUS_INTERRUPT (1<<12)
+#define I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT (1<<11)
+#define I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT (1<<10)
+#define I915_OVERLAY_PLANE_FLIP_PENDING_INTERRUPT (1<<9)
+#define I915_DISPLAY_PLANE_C_FLIP_PENDING_INTERRUPT (1<<8)
+#define I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT (1<<7)
+#define I915_DISPLAY_PIPE_A_EVENT_INTERRUPT (1<<6)
+#define I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT (1<<5)
+#define I915_DISPLAY_PIPE_B_EVENT_INTERRUPT (1<<4)
+#define I915_DEBUG_INTERRUPT (1<<2)
+#define I915_USER_INTERRUPT (1<<1)
+
#define I915REG_HWSTAM 0x02098
#define I915REG_INT_IDENTITY_R 0x020a4
#define I915REG_INT_MASK_R 0x020a8
#define I915REG_INT_ENABLE_R 0x020a0
+#define I915REG_INSTPM 0x020c0
+
+#define PIPEADSL 0x70000
+#define PIPEBDSL 0x71000
#define I915REG_PIPEASTAT 0x70024
#define I915REG_PIPEBSTAT 0x71024
+/*
+ * The two pipe frame counter registers are not synchronized, so
+ * reading a stable value is somewhat tricky. The following code
+ * should work:
+ *
+ * do {
+ * high1 = ((INREG(PIPEAFRAMEHIGH) & PIPE_FRAME_HIGH_MASK) >>
+ * PIPE_FRAME_HIGH_SHIFT;
+ * low1 = ((INREG(PIPEAFRAMEPIXEL) & PIPE_FRAME_LOW_MASK) >>
+ * PIPE_FRAME_LOW_SHIFT);
+ * high2 = ((INREG(PIPEAFRAMEHIGH) & PIPE_FRAME_HIGH_MASK) >>
+ * PIPE_FRAME_HIGH_SHIFT);
+ * } while (high1 != high2);
+ * frame = (high1 << 8) | low1;
+ */
+#define PIPEAFRAMEHIGH 0x70040
+#define PIPEBFRAMEHIGH 0x71040
+#define PIPE_FRAME_HIGH_MASK 0x0000ffff
+#define PIPE_FRAME_HIGH_SHIFT 0
+#define PIPEAFRAMEPIXEL 0x70044
+#define PIPEBFRAMEPIXEL 0x71044
-#define I915_VBLANK_INTERRUPT_ENABLE (1UL<<17)
-#define I915_VBLANK_CLEAR (1UL<<1)
+#define PIPE_FRAME_LOW_MASK 0xff000000
+#define PIPE_FRAME_LOW_SHIFT 24
+/*
+ * Pixel within the current frame is counted in the PIPEAFRAMEPIXEL register
+ * and is 24 bits wide.
+ */
+#define PIPE_PIXEL_MASK 0x00ffffff
+#define PIPE_PIXEL_SHIFT 0
+
+#define I915_FIFO_UNDERRUN_STATUS (1UL<<31)
+#define I915_CRC_ERROR_ENABLE (1UL<<29)
+#define I915_CRC_DONE_ENABLE (1UL<<28)
+#define I915_GMBUS_EVENT_ENABLE (1UL<<27)
+#define I915_VSYNC_INTERRUPT_ENABLE (1UL<<25)
+#define I915_DISPLAY_LINE_COMPARE_ENABLE (1UL<<24)
+#define I915_DPST_EVENT_ENABLE (1UL<<23)
+#define I915_LEGACY_BLC_EVENT_ENABLE (1UL<<22)
+#define I915_ODD_FIELD_INTERRUPT_ENABLE (1UL<<21)
+#define I915_EVEN_FIELD_INTERRUPT_ENABLE (1UL<<20)
+#define I915_START_VBLANK_INTERRUPT_ENABLE (1UL<<18) /* 965 or later */
+#define I915_VBLANK_INTERRUPT_ENABLE (1UL<<17)
+#define I915_OVERLAY_UPDATED_ENABLE (1UL<<16)
+#define I915_CRC_ERROR_INTERRUPT_STATUS (1UL<<13)
+#define I915_CRC_DONE_INTERRUPT_STATUS (1UL<<12)
+#define I915_GMBUS_INTERRUPT_STATUS (1UL<<11)
+#define I915_VSYNC_INTERRUPT_STATUS (1UL<<9)
+#define I915_DISPLAY_LINE_COMPARE_STATUS (1UL<<8)
+#define I915_DPST_EVENT_STATUS (1UL<<7)
+#define I915_LEGACY_BLC_EVENT_STATUS (1UL<<6)
+#define I915_ODD_FIELD_INTERRUPT_STATUS (1UL<<5)
+#define I915_EVEN_FIELD_INTERRUPT_STATUS (1UL<<4)
+#define I915_START_VBLANK_INTERRUPT_STATUS (1UL<<2) /* 965 or later */
+#define I915_VBLANK_INTERRUPT_STATUS (1UL<<1)
+#define I915_OVERLAY_UPDATED_STATUS (1UL<<0)
#define SRX_INDEX 0x3c4
#define SRX_DATA 0x3c5